/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo h1 {
    color: #1a4f8b;
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #1a4f8b;
}

/* 汉堡菜单 */
.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px;
    transition: all 0.3s ease;
}

/* 主页英雄区域 */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    padding: 0 20px;
    margin-top: -80px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #1a4f8b;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #153d6b;
}

/* 特色服务区域 */
.features {
    padding: 5rem 10%;
    background-color: #f9f9f9;
}

.feature-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature i {
    font-size: 2.5rem;
    color: #1a4f8b;
    margin-bottom: 1rem;
}

.feature h3 {
    margin-bottom: 1rem;
}

/* 关于我们预览区域 */
.about-preview {
    padding: 5rem 10%;
    background-color: #fff;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content h2 {
    color: #1a4f8b;
    margin-bottom: 2rem;
}

.learn-more {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.8rem 1.5rem;
    background-color: transparent;
    border: 2px solid #1a4f8b;
    color: #1a4f8b;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.learn-more:hover {
    background-color: #1a4f8b;
    color: #fff;
}

/* 页脚样式 */
footer {
    background-color: #1a4f8b;
    color: #fff;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        right: 0;
        top: 80px;
        background-color: #fff;
        width: 100%;
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 1rem 0;
    }

    .burger {
        display: block;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .feature-container {
        grid-template-columns: 1fr;
    }
}